High-order tillering (HOT) is a common phenomenon in rice production, which is an important syndrome of rice domestication. Two different doubled haploid populations, one derived from a cross between Jingxi 17 and Zhaiyeqing 8 and the other from a cross between Chunjiang 06 and TN1 (herein designated as ZJDH and TCDH, respectively) were used to study genetic characteristics of high-order tillering. By using composite interval mapping, three QTLs (qHOT3, qHOT6-1 and qHOT8) located on chromosomes 3, 6 and 8 in ZJDH population, and two QTLs on chromosomes 6 and 12 in TCDH population, respectively were detected. Meanwhile, four and seven pairs of epistatic loci affecting HOT were mapped in ZJDH and TCDH, respectively. Furthermore, comparative analysis of two QTLs qHOT6-1 and qHOT6-2, which were located on chromosome 6 in the two populations, respectively indicated that the related quantitative trait loci may be identical to each other. And chromosome 6 may play an important role in high-order tillering.
JIANG Hua ，#,ZHAO Jiang-hong ，#,GUO Long-biao ,JIANG Liang ,XUE Da-wei,ZENG Da-li,QIAN Qian,SUN Guo-chang
. QTL Mapping and Epistatic Analysis of High-Order Tillering in Rice (Oryza sativa)[J]. Chinese Journal OF Rice Science, 2011
, 25(2)
: 157
-162
.
DOI: 10.3969/j.issn.1001-7216.2011.02.006
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